New lithium-ion batteries withstand fast charging without degradation

Scientists have developed a new design of a lithium-ion battery for a car that allows it to accumulate 400 kW of energy in 10 minutes without compromising performance.

One of the main problems of electric vehicles istheir prolonged charge, and against the backdrop of the growth of their popularity, scientists began to actively seek ways to solve it. It is known that the process can be accelerated by increasing the temperature of the battery, but because of this, the anode can be coated with lithium metal, significantly reducing the service life.

However, researchers from State UniversityPennsylvania found that the problem can bedecide if the battery will be charged at 60 °C and then discharged at a lower temperature. This allows you not only to speed up the process, but also to avoid degradation.

To do this, they equipped a lithium-ion devicenickel structure that heats up on its own in less than 30 seconds. During the experiments, they increased the temperature of the batteries to 40, 49 and 60 °C and tested different cooling strategies to maintain a constant temperature, comparing the results with a control sample constantly operating at 20 °C.

The team found that preheatedup to 60 °C, the devices can withstand an extremely fast charging process of 1700 cycles, while the reference device only withstood 60 cycles. They determined that when charging between 49 and 60 °C, no lithium coating is formed. The researchers also observed that the increased charging temperature reduced the cooling required to maintain the cell's original temperature.

Technology can be easily integrated into existingproduction, since modifications do not require internal changes, and nickel foil increases the cost of construction by 0.47%, but allows you to save on additional heating modules.

Recently, scientists from Skoltech proposed another way to make batteries durable and quickly charge.

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